Does myLot delete topics that have no responses?

No! They do not delete topics that do not have any responses as long as it does not violate the guidelines because whether the topic has no response or not, it is still very useful. When I was new here, I got few topics that did not receive any response until now but they are still in my discussion list.

If the topics are within the Guidelines then even if they have not received any responses, they still stay put. Onw day someone might respond.

No but they do delete topics that break their guidelines. You can always try to get someone to post on a discussion without any responses to make it active again.

Well I don't think so. I was watching over my unresolved and unresponded discussions today and they are here ,Though same UNRESPONDED (oohooohoooohoooho). So They don't delete them and give the people the chance to get the responses.

Mylot is able to do about anything. There is actually a place where they go but don't seem to be deleted. I forget where, but it is findable. I think that still include some of them since I answered one to day 6 months old. So I hope you don't have many. I will try to check them out if you do and see what I can answer and then maybe someone else will find them!!